交换Pandas Dataframe轴的最有效方法是什么?
例如,如何将df1转换为df2以下?
In [2]: import pandas as pd
In [3]: df1 = pd.DataFrame({'one' : [1., 2., 3., 4.], 'two' : [4., 3., 2., 1.]})
In [4]: df1
Out[4]:
one two
0 1 4
1 2 3
2 3 2
3 4 1
In [5]: df2 = pd.DataFrame({0 : [1,4], 1 : [2,3], 2 : [3,2], 3 : [4,1]}, index=['one','two'])
In [6]: df2
Out[6]:
0 1 2 3
one 1 2 3 4
two 4 3 2 1